[Gordo (Daniel)]

Hi! Long time lurker, first time poster.

For Christmas I was gifted a Celestron 127 SLT, my first telescope. Setting it up on our balcony (Inner West Sydney), terrible light pollution, I was pretty amazed to be fairly clearly make out M42 with the supplied 25mm eyepiece.
Looking for another challenge, I attempted to resolve some double stars with the supplied 9mm plossl.
However, whenever I get close to focus I get a substantial amount of Chromatic Aberration which makes it impossible to focus, much less resolve any doubles
I'm guessing this may be due to the kit eyepiece? Or would it be lack of experience/aperture, or all of the above?